1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1684ae9cbe809964a11b9e20800dc1e97aff9baa6c94b390c40a46f1aa2530f5. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c142cd5-d546-4223-bf94-e55c33604bcc.json and https://artists.proofprofile.net/proofs/artist/7c142cd5-d546-4223-bf94-e55c33604bcc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda87290621701fa6dfd2db8fab3ec077cfa6426ade083c2ee220b31123af8865. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAMM1947508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc876f4e25085f247a29621c4decc386c603c65c14249062fdb7c3a6a72a6e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSR42128672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bbdb7035154655e66df2b81e1e5836e7bcdc5703eecb31d25f0ed176a5d0e1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSR42132602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df9696b71f6d8eb254a7db12619658de243315a222d18d1fcc59ef87e4e2e3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAMM2263044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493cce14a2ad05c05c4093cb4da1e3870f78280eaba45cc44b84a33310f69999. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAMM2263948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf302f0913bf13d02887064394c0ff8a3388f7d455405f1529e26c8baa05ec5e5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAMM2268313.